CBSE Class 8 Science
Question 1 of 14
Microorganisms : Friend and Foe — Question 1
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Question Question 1
Fill in the blanks.
(a) Microorganisms can be seen with the help of a ............... .
(b) Blue green algae fix ............... directly from air and enhance fertility of soil.
(c) Alcohol is produced with the help of ............... .
(d) Cholera is caused by ............... .
(a) Microorganisms can be seen with the help of a microscope .
(b) Blue green algae fix nitrogen directly from air and enhance fertility of soil.
(c) Alcohol is produced with the help of yeast .
(d) Cholera is caused by bacteria .